feat: add mysql svr

__database/mysqlsvr/src/main.rs

@@ -0,0 +1,26 @@
+mod backend;
+
+use std::net::TcpListener;
+use std::thread;
+use msql_srv::*;
+use mysql::prelude::*;
+
+use backend::*;
+
+fn main() {
+    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+    let port = listener.local_addr().unwrap().port();
+
+    let jh = thread::spawn(move || {
+        if let Ok((s, _)) = listener.accept() {
+            MysqlIntermediary::run_on_tcp(Backend, s).unwrap();
+        }
+    });
+
+    println!("MySQL port: {}", port);
+    let mut db = mysql::Conn::new(&format!("mysql://127.0.0.1:{}", port)).unwrap();
+    assert_eq!(db.ping(), true);
+    assert_eq!(db.query_iter("SELECT a, b FROM foo").unwrap().count(), 1);
+    drop(db);
+    jh.join().unwrap();
+}